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黄铁矿是金矿床中常见的矿物，也是重要的载金矿物之一，有的黄铁矿富金，有的黄铁矿不含金或含微量金。为什么黄铁矿对纳米金的吸附作用强？讨论了纳米微粒金与黄铁矿的关系后指出，半导体型黄铁矿有Ｎ型和Ｐ型两种。前者具负热电动势、带负电；后者具正电位带正电荷。当其与ＳｉＯ２水溶液迁移时，若与带正电荷的Ｐ型黄铁矿相遇，即被Ｐ型黄铁矿吸附沉淀成矿。带负电荷的黄铁矿不能吸附带负电荷的纳米金，因而不能成矿。
Pyrite is a common mineral in gold deposits. It is also one of the important gold-bearing minerals. Some pyrite is rich in gold and some pyrite contains no gold or trace gold. Why pyrite adsorption of nano gold strong? After discussing the relationship between nanoparticle gold and pyrite, it is pointed out that there are two types of semiconductor pyrite, N-type and P-type. The former negative thermal emf, with negative charge; the latter positive charge with positive potential. When it migrates with SiO2 aqueous solution, if it encounters positively charged P-type pyrite, it is adsorbed and precipitated by P-type pyrite mineralization. Negatively charged pyrite can not adsorb negatively charged nano-gold and therefore can not be mineralized.